Knurling tool



Dec. 19, 1944. w. H. KAY 2,365,197

KNURLING TOOL Filed Oct. 6, 1943 2 Sheets-Sheet l4 5 a C) 4 9 .9 8 8 7 /3 O 7 j m 2' O I O I #1 g /7 a O O o Inventor 7 W Attorneys W. H. KAY

KNURLING TOOL Dec. 19, 1944.

Filed Oct. 6, 1943 2 Sheets-Sheet 2 lm'eutar J, n, v 6 a j m My b v J W v 2 k 5 w m /0 a z j J m Patented Dec. 19, 1944 K'NURLING TOOL William I -Iarry Kay,'Columbus, Ohio, asslgnorof one-halfto Marie M. Janotta, Columbus, Ohio Application October 6, 1943,1Serialhlo.5 05,2341 f I 3 Claims. (01:80-51) The present invention relates to :new and useful improvements v-:in knurling tools, and has for its primary object to; provide, iniamanner as hereinafter set forth, a device of this character which is particularly adapted to be used in .conjunction with drill pressesylathes and other machine tools for expeditiously lknurling' round metal bars of various lengths and diameters.

Another very important-object of the invention is to provide .atool-of the aforementioned character which .embodies noyel means for adjusting the knurling rollers.

Other objects of the invention are to provide a knurling tool of the character described which will be comparatively simple in construction, strong, durable, highly efficient and reliable in use, compact, and which may be manufactured at low cost.

All of the foregoing, and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawings, wherein like characters of reference designate corresponding parts throughout the several views and wherein:

Figure 1 is a-top plan view of a knurling tool constructed in accordance with the present in vention.

Figure 2 is a view in front elevation of the device.

Figure 3 is a. fragmentary view in vertical section through an upper portion of the tool.

Figure 4 is a vertical sectional view, taken substantially on the line 4-4 of Figure 1.

Figure 5 is a detail view in bottom plan of the knurling roller holder.

Figure 6 is a fragmentary view in vertical section, taken substantially on the line 6-6 of Figure 4.

Figure 7 is a top plan view of an embodiment for use in conjunction with lathes and other horizontal machine tools.

Referring now to the drawings in detail, it will be seen that reference character I designates a block-like substantially cylindrical metallic body having a centrally located bore 2 extending vertically therethrough for the passage of the stockto be knurled. The body I is mounted on one end of'a knurled handle 3. Apertured ears 4 project from the lower portion of the body I, whereby said body, if desired, may be secured in position on the table or bed of a drill press or other machine tool. 7

The body I includes, on one side, a raised or comparatively high top portion 5 having therein a groove ,6 (see which communicates with the bore 2. Substantially;segmental metallic plates .1 are removably secured by hollow-head screws 8 on the raised upper portion 50f the body I on opposite sides of the groove 6. As also illustrated to advantage in Figure 3 of'the drawings, the plates I project over the groove 6 in a manner to define a.T -slotinconjunction therewith. DoWe1s 9 .in the plates 1 are engagea-blein bores which are provided therefor inthe body I.

A T--member Ibis mounted for sliding adjustment in the groove 6 and between the plates 1. The plates I clamp the member ID in adjusted position. Mounted vertically on the member In is a spindle or the like II. comprising a flanged upper end portion I2, saidspindle being secured in position by a bolt I3. A roller I4 isjournalled on the upper portion of the spindle II beneath the flange I2.

Also communicating with the bore 2 in 'the upper portion of the body I is a T slot or groove I5. A T-member I6 is mounted for sliding adjustment in the groove I5. Rising from the memframe I8 which, as best seen in Figure 6 of the drawings, rests on top of the body I. Fixed by suitable means, such as welding or countersunk screws, to the under side of the frame I8 and operable in the upper portion of the groove I5 is a metallic U-member I9. Knurling rollers 20 are journaled for rotation in a horizontal plane in the forward end portion of the frame I8. The bolt II secures the frame I8 in adjusted position. The frame I8, in addition to being slidably adjustable, is also reversible and knurling rollers may be provided in both ends thereof.

Secured by bolts 2| on the body I adjacent th handle 3is a vertical metallic bar 22. J ournaled horizontally in the upper portion of the bar 22 is a manually rotatable, internally threaded sleeve I 23. A nut 24 rotatably retains the sleeve 23 in the bar 22. A rod 25 is threaded for adjustment in the sleeve 26 and has a slot in its inner end receiving the adjacent depending end portion of the U-member I9 so as to be operable for shifting the knurling rollers 20.

It is thought that the operation of the tool will be readily apparent from a consideration of the foregoing. Briefly, the stock to be knurled is mounted in the chuck of the drill press, for example, and the body I is placed in position on the table or bed of the machine with the bore 2 in vertical alignment with the stock, or substantially so. With the rollers 14 and 20 properlyadjusted,

the work is fed downwardly through the bore 2 and, of course, as it passes the rollers 20, said work is knurled thereby. The knurling rollers 20 may be expeditiously and accurately adjusted to exert any desired pressure against the work through the medium .of the sleeve 23.

The embodiment illustrated in Figure 7 of the drawings is for use 'in conjunction with lathes and other horizontal machine tools. Toward this end, the handle 3 is removed from the body I. The device is placed on the cross slide of the machine on center by being held on'the cross slide by a bolt to fit the T slides of whatever type horizontal machine is used. The feeding of the materials to be knurled is done through the head stock of the machine to whatever length said machine will accommodate.

It is believed that the many advantages of a I knurling tool constructed in accordance with the present invention will be readily understood, and

above the groove, knurling rollers journaled in said frame, a bolt connecting the frame to the T-member for securing said member and said frame in adjusted position on the body, and means for adjusting th frame.

2. A knurling tool comprising a body having a bore therein for the passage of the work, a supporting roller on the body engageable with the work, a frame carrying a pair of knurling rollers and mounted on the body and slidable toward and away from the work, and means for adjustingsaid frame, said means including a substantially U-shaped member fixed to the under side of the frame and operable in the groove, a bar mounted on the body, a manually rotatable sleeve journaled in said bar, and a rod threadedly mounted in the sleeve and connected to said U- member.

3. A knurling tool of the character described comprising a body having a bore therein for the passage of a piece of work, said body further having a groove therein communicating with the bore at one end, a T-member adjustable in the groove, plates removably secured on the body on opposite sides of the groove and projecting thereover for engagement with the T-member for securing said T-member in adjusted position, a vertical spindle mounted on the T-member, a work engaging roller journaled on said spindle, and a pair of knurling rollers mounted on the body.

WILLIAM HARRY KAY. 

